You have Very Nice Cars. I admire Any Turbo Powered Car. I have owned Turbo Cars since early 90's from a Talon, Sprint, and the GN. Do a Search and you will find a few of awsome Buick Builders to build it the way you like it.
But nothing is like a Turbo Engine backed with an Automatic Trans with a Brake. The Shock will shake you up.
Once again VERY NICE CARS...
Joe
Thanks man. I'm the same way. I'm just a turbo guy.
BTW, second GN on the way.